package com.hwh.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Component
public class PaymentService {

    /**
     * 正常访问肯定没问题的方法
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id){
        return "线程池:"+Thread.currentThread().getName()+"  PaymentInfo_OK: "+id+"\t"+"emoji哈哈哈";
    }

    /**
     * 模拟会出错的方法
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            //设置自身调用超时时间的峰值，峰值内可以正常运行，超过了峰值则降级fallback
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="3100")
    })
    //一旦paymentInfo_TimeOut调用失败就会立即调用fallbackMethod中定义的方法
    public String paymentInfo_TimeOut(Integer id){
        int timeNumber = 3;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池:"+Thread.currentThread().getName()+"  PaymentInfo_TimeOut: "+id+"\t"+"emoji哈哈哈 耗时"+timeNumber+"秒";
    }

    public String paymentInfo_TimeOutHandler(Integer id){
        return "线程池:"+Thread.currentThread().getName()+"  paymentInfo_TimeOutHandler: "+id+"\t"+"对不起对不起对不起qaq";
    }


    //---------------服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),// 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),// 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),// 失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if(id < 0) {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }


}
